P257B

Vacuum Reservoir Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Deterioration of the brake system
Uneven engine operation
Reduced engine power
Problems with the EGR system

Causes

Open or short circuit in control circuit
Vacuum reservoir sensor malfunction
Solenoid valve problems
Vacuum reservoir malfunction
Wiring harness damage

How to Fix

Check the integrity of the control circuit
Test the vacuum reservoir sensor
Check the operation of the solenoid valve
Inspect and, if necessary, replace the vacuum reservoir
Check the condition of the wiring harness

Related codes

P257A P257C P257D